Harrod-Domar equation

The Harrod-Domar model is a foundational concept in economics that explains economic growth. Developed independently by Roy Harrod and E.D. Domar, it links investment to both demand and supply. The model posits that investment increases demand through a multiplier effect and simultaneously increases the economy's capacity to produce goods and services. For sustained growth, the rate at which demand increases must match the rate at which productive capacity grows. The model highlights the potential for instability if these rates diverge, leading to either excess capacity or insufficient demand. This theory has been applied to understanding economic development.123